It's just a trackball. One of the things you want with trackballs is that they "grip" to the surface so it doesn't move easily, the exact opposite you'd want w

It's just a trackball. One of the things you want with trackballs is that they "grip" to the surface so it doesn't move easily, the exact opposite you'd want with a mouse, so you need some solution for that (removable bottom like the MX ergo?) I agree it might be nice, but I think it's probably a niche in an already niche market.